const regex = /^(?:(?:10\.\d{1,3}\.\d{1,3}\.\d{1,3}|172\.(?:(?:1[6-9])|(?:2[0-9])|(?:3[0-1]))\.\d{1,3}\.\d{1,3}|192\.168\.\d{1,3}\.\d{1,3}|127\.\d{1,3}\.\d{1,3}\.\d{1,3})(?::\d{1,5})?)$/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('^(?:(?:10\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}|172\\.(?:(?:1[6-9])|(?:2[0-9])|(?:3[0-1]))\\.\\d{1,3}\\.\\d{1,3}|192\\.168\\.\\d{1,3}\\.\\d{1,3}|127\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3})(?::\\d{1,5})?)$', 'gm')
const str = `127.0.0.1
127.255.255.255
127.0.0.1:3000
10.0.0.1
10.0.0.2
10.0.1.1
10.0.1.2:443
172.16.0.1
172.16.0.2
172.16.1.1
172.16.1.2
192.168.0.1
192.168.0.2
192.168.1.1
192.168.1.2
10.10.10.1
10.10.10.2
172.31.255.1
172.31.255.2
192.168.100.1
192.168.100.2
10.255.255.1
10.255.255.2
8.8.8.8:80
1.1.1.1
1.0.0.1
198.41.0.4
64.233.160.0
208.67.222.222:8080`;
// Reset `lastIndex` if this regex is defined globally
// regex.lastIndex = 0;
let m;
while ((m = regex.exec(str)) !== null) {
// This is necessary to avoid infinite loops with zero-width matches
if (m.index === regex.lastIndex) {
regex.lastIndex++;
}
// The result can be accessed through the `m`-variable.
m.forEach((match, groupIndex) => {
console.log(`Found match, group ${groupIndex}: ${match}`);
});
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions